<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
            width: 200px;
            height: 200px;
            background-color: red;
        }
    </style>
</head>

<body>
    <div class="box">
        hehehe
    </div>
    <script>
        // 鼠标经过事件
        // 获取dom对象
        const box = document.querySelector('.box')
        // 事件监听
        box.addEventListener('click', function () {
            console.log('鼠标点击了');
        })

        box.addEventListener('mouseenter', function () {
            console.log('鼠标进来了');
        })

        box.addEventListener('mouseleave', function () {
            console.log('鼠标离开');
        })
    </script>
</body>

</html>